52639 + Interview Questions in Secondary School in Chemistry

1.	What is steric effect give defination and examples
Answer» ANSWER: Steric effects are the effects SEEN in MOLECULES that come from the fact that atoms OCCUPY space.Example an Sn2 reaction does not happen on carbon atoms that have three subsiduents

1.

What is steric effect give defination and examples

Answer»

Steric effects are the effects SEEN in MOLECULES that come from the fact that atoms OCCUPY space.Example an Sn2 reaction does not happen on carbon atoms that have three subsiduents

Discussion

2.	Show the formation of an oxygen molecule
Answer» Answer: In a COVALENT bond, electrons are SHARED between two atoms. When two oxygen atoms bond together to forman oxygen molecule, they share four electrons – two from each oxygen atom. Other EXAMPLES of covalent bonding are water (H2O), and carbon dioxide (CO2). The oxygen molecule is made up of twooxygen atoms bonded together. However, in CERTAIN circumstances, three oxygen atoms bond together,forming a molecule called ozone. Oxygen molecule is formed by the sharing of electrons (2 electrons each) between 2 Oxygen atoms.

2.

Show the formation of an oxygen molecule

Answer»

Answer:

In a COVALENT bond, electrons are SHARED between two atoms. When two oxygen atoms bond together to forman oxygen molecule, they share four electrons – two from each oxygen atom. Other EXAMPLES of covalent bonding are water (H2O), and carbon dioxide (CO2). The oxygen molecule is made up of twooxygen atoms bonded together. However, in CERTAIN circumstances, three oxygen atoms bond together,forming a molecule called ozone. Oxygen molecule is formed by the sharing of electrons (2 electrons each) between 2 Oxygen atoms.

Discussion

3.	Compare the rate of diffusion of liquid and solid with reason
Answer» ANSWER: the RATE of diffusion of LIQUID and solid Explanation: the rate of diffusion of liquid is higher than the solid state . it is the rule usually . the in the diffusion gas .rate of free molecules are high in surroundings so diffusion is high and comparition of gas the liquid is low diffusion because low AMOUNT of free molecules in LIQUIDS .and solid is poor when compared to gas,liquid ..........so according to question the rate of diffusion liquid is higher than the solid. hope its help u❤❤.... if u like mark as a brainlyst❤

3.

Compare the rate of diffusion of liquid and solid with reason

Answer»

ANSWER:

the RATE of diffusion of LIQUID and solid

Explanation:

the rate of diffusion of liquid is higher than the solid state . it is the rule usually . the in the diffusion gas .rate of free molecules are high in surroundings so diffusion is high and comparition of gas the liquid is low diffusion because low AMOUNT of free molecules in LIQUIDS .and solid is poor when compared to gas,liquid ..........so according to question the rate of diffusion liquid is higher than the solid. hope its help u❤❤.... if u like mark as a brainlyst❤

Discussion

4.	Distinguish between sodium chloride ,sodium sulphite and sodium sulfate
Answer» Answer: SODIUM sulphate ( NA2SO4 ),the sulphate of soda, is an inorganic compound related with several hydrates. These all are white solids which are highly SOLUBLE in water. ... Sodium sulphite ( Na2SO3 ) is a solublesodium salt of the sulphurous acid (Sulphite). It is a part ofSulphur DIOXIDE scrubbing. Plzz mark me the brainliest!!! Follow me!!

4.

Distinguish between sodium chloride ,sodium sulphite and sodium sulfate

Answer»

Answer:

SODIUM sulphate ( NA2SO4 ),the sulphate of soda, is an inorganic compound related with several hydrates. These all are white solids which are highly SOLUBLE in water. ... Sodium sulphite ( Na2SO3 ) is a solublesodium salt of the sulphurous acid (Sulphite). It is a part ofSulphur DIOXIDE scrubbing.

Plzz mark me the brainliest!!!

Follow me!!

Discussion

5.	What is the meaning of SAARC
Answer» EXPLANATION: SAARC STANDS for : - S - South A - ASIAN A - ASSOCIATION for R - Religional C - Cooperation

5.

What is the meaning of SAARC

Answer»

EXPLANATION:

SAARC STANDS for : -

S - South

A - ASIAN

A - ASSOCIATION for

R - Religional

C - Cooperation

Discussion

6.	What is perod in periodic table
Answer» Answer: EXPLANATION: The horizontal arrangement of elements is called as PERIOD Eg. LI BE B C N O F NE

6.

What is perod in periodic table

Answer»

Answer:

EXPLANATION:

The horizontal arrangement of elements is called as PERIOD

Eg. LI BE B C N O F NE

Discussion

7.	How much mass of aluminium can be obtained from 0.1 mole of Aluminium Sulphate
Answer» 1 MOLE of ALUMINIUM SULPHATE is 26.982g

Discussion

8.	Calculate the mass of 0.2 moles of water
Answer» Answer:3.8 gm Explanation:

8.

Calculate the mass of 0.2 moles of water

Answer»

Answer:3.8 gm

Explanation:

Discussion

9.	When iron and sulphur are heated at high temprature whar colour is formed
Answer» ANSWER: the COLOUR will CHANGE from YELLOW to BLACK

9.

When iron and sulphur are heated at high temprature whar colour is formed

Answer»

ANSWER:

the COLOUR will CHANGE from YELLOW to BLACK

Discussion

10.	Technies of sublimation
Answer» ANSWER: Hey mate... Good evening...♥ Sublimation is a type of phase transition,or a change in state of matter,just like melting,freezing and evaporation...Through sublimation,a substance changes from a solid to a gas without ever passing through a liquid phase... Hope it helps...!!! Have a great day ahead...^_^

10.

Technies of sublimation

Answer»

ANSWER:

Hey mate...

Good evening...♥

Sublimation is a type of phase transition,or a change in state of matter,just like melting,freezing and evaporation...Through sublimation,a substance changes from a solid to a gas without ever passing through a liquid phase...

Hope it helps...!!!

Have a great day ahead...^_^

Discussion

11.	C + o2gives co2 calculate delta ng
Answer» Explanation: c+ o2 -> co2 NG = 1 -2 ng = -1 ANSWER

11.

C + o2gives co2 calculate delta ng

Answer»

Explanation:

c+ o2 -> co2

NG = 1 -2

ng = -1 ANSWER

Discussion

12.	under identical conditions of temperature and pressure 4l of gaseous mixture i.e. H2 and CH4 diffuses through a hole in 5min. whereas 4L of a gas X of molar mass 36 takes 10 min to diffuse through a same hole. mole ratio of H2 :CH4 in the mixture will be
Answer» Answer: 1:1. Explanation: From the chapter of the STATES of matter we know that the molar mass is INVERSELY proportional to the radius of the gasses. So, we GET that the radius of GAS 1 to the radius of gas 2 will be √(molar mass of gas 2/molar mass of the gas 1). While we know that the radius can also be written as time of gas 1 / time of gas 2 to diffuse. So, 4v/t1t2/4v = √(36/(H2+CH4)) which will be 10/5 = 6/√(H2+CH4). Which will be (H2+CH4)=9. Now, if the moalr ratios are taken x and y for CH4 and H2 respectively. So, 16x + 2*y/x+y = 9 or 7x=7y or x/y will be 1:1.

12.

under identical conditions of temperature and pressure 4l of gaseous mixture i.e. H2 and CH4 diffuses through a hole in 5min. whereas 4L of a gas X of molar mass 36 takes 10 min to diffuse through a same hole. mole ratio of H2 :CH4 in the mixture will be

Answer»

Answer:

1:1.

Explanation:

From the chapter of the STATES of matter we know that the molar mass is INVERSELY proportional to the radius of the gasses. So, we GET that the radius of GAS 1 to the radius of gas 2 will be √(molar mass of gas 2/molar mass of the gas 1).

While we know that the radius can also be written as time of gas 1 / time of gas 2 to diffuse. So, 4v/t1*t2/4v = √(36/(H2+CH4)) which will be 10/5 = 6/√(H2+CH4). Which will be (H2+CH4)=9.

Now, if the moalr ratios are taken x and y for CH4 and H2 respectively. So, 16*x + 2*y/x+y = 9 or 7x=7y or x/y will be 1:1.

Discussion

13.	What is the chemical formula of scandium thiosulfate
Answer» ANSWER: hi DEAR here is ur answer Formula: Sc2(S2O3)3

13.

What is the chemical formula of scandium thiosulfate

Answer»

ANSWER:

hi DEAR

here is ur answer

Formula: Sc2(S2O3)3

Discussion

14.	Point out the difference between 12 g of carbon 12u of carbon
Answer» Answer: 12g of CARBON is WAIT of carbon and 12U is a ATOM of carbon 1u=0.622*10^23

14.

Point out the difference between 12 g of carbon 12u of carbon

Answer»

Answer:

12g of CARBON is WAIT of carbon

and 12U is a ATOM of carbon

1u=0.622*10^23

Discussion

15.	What is the sign of copper?
Answer» ANSWER:It is Cu Explanation:

15.

What is the sign of copper?

Answer»

ANSWER:It is Cu

Explanation:

Discussion

16.	How many particales are present in 1 mole of a substance
Answer» Answer: 1 MOLE of EVERY SUBSTANCE CONTAINS 6.022*10^23 PARTICLES.

16.

How many particales are present in 1 mole of a substance

Answer»

Answer:

1 MOLE of EVERY SUBSTANCE CONTAINS 6.022*10^23 PARTICLES.

Discussion

17.	Mass dpes not chanve surinv chemical reaction
Answer» Answer: MASS of REACTANT = mass of product HOWEVER in INCOMPLETE reaction mass of reactant = mass of product + mass of unreacted reactant

17.

Mass dpes not chanve surinv chemical reaction

Answer»

Answer:

MASS of REACTANT = mass of product

HOWEVER in INCOMPLETE reaction

mass of reactant = mass of product + mass of unreacted reactant

Discussion

18.	What are the different rule forfilling up eletrens in orbital formany eletrom atom
Answer» ANSWER: what was it on the time in that DAY I want to come to my ONE just my same day I don't want the one time... Explanation: MARK me as briliant ..

18.

What are the different rule forfilling up eletrens in orbital formany eletrom atom

Answer»

ANSWER:

what was it on the time in that DAY I want to come to my ONE just my same day I don't want the one time...

Explanation:

MARK me as briliant ..

Discussion

19.	Number of oxygen atoms in 8 g of ozone is -
Answer» Heya Buddy!!...Here's your answer.... 8G of ozone WOULD CONTAIN *3.011510^23** atoms of oxygen. Hope it helps you... Mark my answer as the BRAINLIEST.....

19.

Number of oxygen atoms in 8 g of ozone is -

Answer»

Heya Buddy!!...Here's your answer....

8G of ozone WOULD CONTAIN 3.0115*10^23 atoms of oxygen.

Hope it helps you...

Mark my answer as the BRAINLIEST.....

Discussion

20.	You are given three materials in the form of solution citric acid magnesium hydroxide and sodium sulphate using purple cabbage solution how will you classify the given substance as acidic basic and neutral?
Answer» Answer: Its red CABBAGE INDICATOR. In neutral, it REMAINS red. In acidic, I THINK it changes to PURPLE and in basic it changes to blue. Explanation:

20.

You are given three materials in the form of solution citric acid magnesium hydroxide and sodium sulphate using purple cabbage solution how will you classify the given substance as acidic basic and neutral?

Answer»

Answer:

Its red CABBAGE INDICATOR. In neutral, it REMAINS red. In acidic, I THINK it changes to PURPLE and in basic it changes to blue.

Explanation:

Discussion

21.	Why do liquids have mostly lower density than solids
Answer» Answer: Hey mate... Good evening...♥ Liquids have lower density than solids...In solids,the molecules are very CLOSELY arranged...Hence having less intermolecular space and strong intermolecular forces...This makes the solid hard and to possess high density... Hope it helps...!!! Have a grt day ahead...^_^

21.

Why do liquids have mostly lower density than solids

Answer»

Answer:

Hey mate...

Good evening...♥

Liquids have lower density than solids...In solids,the molecules are very CLOSELY arranged...Hence having less intermolecular space and strong intermolecular forces...This makes the solid hard and to possess high density...

Hope it helps...!!!

Have a grt day ahead...^_^

Discussion

22.	Explain chapter chemical bonding and molecular structure
Answer» Explanation: in this chapter you'll get to know about different TYPES of CHEMICAL bonds like: 1. IONIC bond. 2. covalent bond 3. hydrogen Bond. ETC. and you will also STUDY about the structure of the molecules and there sizes . you will also get to know about hyberdization , molecular orbital theory etc....

22.

Explain chapter chemical bonding and molecular structure

Answer»

Explanation:

in this chapter you'll get to know about different TYPES of CHEMICAL bonds like:

1. IONIC bond.

2. covalent bond

3. hydrogen Bond. ETC. and you will also STUDY about the structure of the molecules and there sizes .

you will also get to know about hyberdization , molecular orbital theory etc....

Discussion

23.	What is neutralisation reaction?Give an example.
Answer» Explanation: A neutralization REACTION is when an acid and a base react to form water and a SALT and INVOLVES the COMBINATION of H+ ions and OH- ions to generate water. The neutralization of a strong acid and strong base has a pH equal to 7. A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water. The neutralization of a strong acid and strong base has a pH equal to 7

23.

What is neutralisation reaction?Give an example.

Answer»

Explanation:

A neutralization REACTION is when an acid and a base react to form water and a SALT and INVOLVES the COMBINATION of H+ ions and OH- ions to generate water. The neutralization of a strong acid and strong base has a pH equal to 7.

A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water. The neutralization of a strong acid and strong base has a pH equal to 7

Discussion

24.	Conditions neccessary for burning
Answer» Explanation: There must be Fuel to burn. There must be AIR to supply oxygen. There must be Heat (ignition temperature) to START and CONTINUE the combustion process.

24.

Conditions neccessary for burning

Answer»

Explanation:

There must be Fuel to burn.

There must be AIR to supply oxygen.

There must be Heat (ignition temperature) to START and CONTINUE the combustion process.

Discussion

25.	Which is small A) covalent radiiB)metallic radii
Answer» I HOPE METALLIC RADII is the SMALLEST....

Discussion

26.	Define heterogeneous mixture give examples
Answer» Explanation: A HETEROGENEOUS mixture is simply any mixture that is not uniform in composition - it's a non-uniform mixture of smaller constituent PARTS. USING various means, the parts in the mixture can be SEPARATED from one another.Examples include ICE cubes in a drink, sand and water, and salt and oil.

26.

Define heterogeneous mixture give examples

Answer»

Explanation:

A HETEROGENEOUS mixture is simply any mixture that is not uniform in composition - it's a non-uniform mixture of smaller constituent PARTS.

USING various means, the parts in the mixture can be SEPARATED from one another.Examples include ICE cubes in a drink, sand and water, and salt and oil.

Discussion

27.	Complete this sentence. If the force of gravity ________, the weight of an object will _______________.decreases, increaseincreases, increaseincreases, stay the samedecreases, stay the sameQuestion 2(Multiple Choice Worth 4 points)(01.02 MC) Two objects of the same mass are on two different planets. Planet A has a force of gravity that is stronger than that of Planet B. How will the weights of the objects compare to each other?The weights of the objects will be the same.The weight of the object on planet A will be greater than the weight of the object on planet B.The weight of the object on planet A will be less than the weight of the object on planet B.This cannot be determined without knowing the actual mass of the objects.Question 3(Multiple Choice Worth 4 points)(01.02 MC) Astronauts who traveled to the moon were able to float slightly as they walked along its surface. Why were the astronauts able to do this?The weight of the astronaut on Earth is less than his weight on the moon.The mass of the astronaut on Earth is less than his mass on the moon.The weight of the astronaut on Earth is greater than his weight on the moon.The mass of the astronaut on Earth is greater than his mass on the moon.Question 4(Multiple Choice Worth 3 points)(01.02 LC) What is the metric unit for length?MetersMilesDistanceInchesQuestion 5(Multiple Choice Worth 3 points)(01.02 LC) Which unit of measurement is used in the metric system?TonsKilogramsMilesGallonsQuestion 6(Multiple Choice Worth 3 points)(01.02 LC) What is the amount of matter in an object?KilogramsMassVolumeWeight30 points plz i need this
Answer» ANSWER: MASS is a AMOUT of MATTER

27.

Complete this sentence. If the force of gravity , the weight of an object will _______.decreases, increaseincreases, increaseincreases, stay the samedecreases, stay the sameQuestion 2(Multiple Choice Worth 4 points)(01.02 MC) Two objects of the same mass are on two different planets. Planet A has a force of gravity that is stronger than that of Planet B. How will the weights of the objects compare to each other?The weights of the objects will be the same.The weight of the object on planet A will be greater than the weight of the object on planet B.The weight of the object on planet A will be less than the weight of the object on planet B.This cannot be determined without knowing the actual mass of the objects.Question 3(Multiple Choice Worth 4 points)(01.02 MC) Astronauts who traveled to the moon were able to float slightly as they walked along its surface. Why were the astronauts able to do this?The weight of the astronaut on Earth is less than his weight on the moon.The mass of the astronaut on Earth is less than his mass on the moon.The weight of the astronaut on Earth is greater than his weight on the moon.The mass of the astronaut on Earth is greater than his mass on the moon.Question 4(Multiple Choice Worth 3 points)(01.02 LC) What is the metric unit for length?MetersMilesDistanceInchesQuestion 5(Multiple Choice Worth 3 points)(01.02 LC) Which unit of measurement is used in the metric system?TonsKilogramsMilesGallonsQuestion 6(Multiple Choice Worth 3 points)(01.02 LC) What is the amount of matter in an object?KilogramsMassVolumeWeight30 points plz i need this

Answer»

ANSWER:

MASS is a AMOUT of MATTER

Discussion

28.	which gas is produced when dilute hydrochloric acid is added to a reactive metal write the chemical reaction when iron react with dilute H2so4
Answer» ANSWER: FE + H2 so 4 ---------~ Fe 2( so 4)2

28.

which gas is produced when dilute hydrochloric acid is added to a reactive metal write the chemical reaction when iron react with dilute H2so4

Answer»

ANSWER:

FE + H2 so 4 ---------~ Fe 2( so 4)2

Discussion

29.	What is wrong with the following chemical equation? mg+o - mgo
Answer» ANSWER: MG is other THING and o is other thing than it will FORM MGO

29.

What is wrong with the following chemical equation? mg+o - mgo

Answer»

ANSWER:

MG is other THING and o is other thing than it will FORM MGO

Discussion

30.	Explain the physical prporties of metals with sutable examples
Answer» Answer: . Explanation: the physical properties of metals are as follows Ductile- the property of metals that they can be drawn into thin wire is known as a sonority metals are ductile is non metals are non-ductile. GOLD is the most ductile metal other examples are silver aluminum copper etc Malleability- the property of metals that they can be beaten into thin sheets is called malleability.Gold is most malleable.Non metals are not malleable. six-Fold silver etc. Lustrous-Metal have a shinny APPEARANCE which is called lustrous.Non metals are not lustrous. expection-graphite Sonorus-Metals sounds a ringing SOUND which is called sonority. non metals are non-sonorus.ex-gold etc. High conductivity of Electricity-Metals are good conductors of electricity where non metals are not good conductor of electricity. ex silver is the best conductor of electricity. High THERMAL conductivity- Metals are good conductors of heat whereas non metals are not good conductors of heat. ex-Copper,silver etc. Brittleness-The property of non metals that break easily with hammer is called Brittle non metals are brittle whereas metals are non brittle. HOPE IT WILL HELP YOU. MARK ME BRAINLEST

30.

Explain the physical prporties of metals with sutable examples

Answer»

Answer:

.

Explanation:

the physical properties of metals are as follows

Ductile- the property of metals that they can be drawn into thin wire is known as a sonority metals are ductile is non metals are non-ductile. GOLD is the most ductile metal other examples are silver aluminum copper etc

Malleability- the property of metals that they can be beaten into thin sheets is called malleability.Gold is most malleable.Non metals are not malleable.

six-Fold silver etc.

Lustrous-Metal have a shinny APPEARANCE which is called lustrous.Non metals are not lustrous. expection-graphite

Sonorus-Metals sounds a ringing SOUND which is called sonority. non metals are non-sonorus.ex-gold etc.

High conductivity of Electricity-Metals are good conductors of electricity where non metals are not good conductor of electricity. ex silver is the best conductor of electricity.

High THERMAL conductivity- Metals are good conductors of heat whereas non metals are not good conductors of heat.

ex-Copper,silver etc.

Brittleness-The property of non metals that break easily with hammer is called Brittle non metals are brittle whereas metals are non brittle.

HOPE IT WILL HELP YOU.

MARK ME BRAINLEST

Discussion

31.	Tell me All Charge of elements on periodic table:
Answer» Answer: there is only ONE charge on 1 elements it can be anion or CATION and neutral charge also

31.

Tell me All Charge of elements on periodic table:

Answer»

Answer:

there is only ONE charge on 1 elements it can be anion or CATION and neutral charge also

Discussion

32.	The solubility product of ferric hydroxide in aquous solution is 3.8*10^-34 at 298k the solubility of fe3+ions will increase whena.ph is increased b.ph is decreasedc.ph is 7 c.saturated solution is exposed to atmosphere
Answer» ANSWER: PH is INCREASED.................... ................................ ............ ........ ...... ..... . .

32.

The solubility product of ferric hydroxide in aquous solution is 3.8*10^-34 at 298k the solubility of fe3+ions will increase whena.ph is increased b.ph is decreasedc.ph is 7 c.saturated solution is exposed to atmosphere

Answer»

ANSWER:

PH is INCREASED....................

................................

............

........

......

.....

.

Discussion

33.	5. State whether the following statement is true or false :A chemical equation can be balanced easily by altering the formula of a reactan
Answer» ANSWER: true Explanation: because the EQUATION is a WRITE in PROPERLY

33.

5. State whether the following statement is true or false :A chemical equation can be balanced easily by altering the formula of a reactan

Answer»

ANSWER:

true

Explanation:

because the EQUATION is a WRITE in PROPERLY

Discussion

34.	What is the dilute solutions explain...
Answer» Answer: DILUTION is the PROCESS of decreasing the concentration of a solute in a SOLUTION, USUALLY simply by mixing with more solvent like adding more water to a solution. To dilute a solution means to add more solvent without the ADDITION of more solute.

34.

What is the dilute solutions explain...

Answer»

Answer:

DILUTION is the PROCESS of decreasing the concentration of a solute in a SOLUTION, USUALLY simply by mixing with more solvent like adding more water to a solution. To dilute a solution means to add more solvent without the ADDITION of more solute.

Discussion

35.	If the solubility product of mg(oh)2 is 2 what is solubility
Answer» ANSWER: MAGNESIUM...........

35.

If the solubility product of mg(oh)2 is 2 what is solubility

Answer»

ANSWER:

MAGNESIUM...........

Discussion

36.	How many unpaired electrons in d orbital are present in Cr(24)
Answer» Answer: Four unpaired ELECTRONS Explanation: electronic configuration of CR24 is 1s2 2s2 2p6 3S2 3p6 3d6, d orbital has five orentiation. So one electron is paired, then other four electrons will be unpaired

36.

How many unpaired electrons in d orbital are present in Cr(24)

Answer»

Answer:

Four unpaired ELECTRONS

Explanation:

electronic configuration of CR24 is

1s2 2s2 2p6 3S2 3p6 3d6,

d orbital has five orentiation.

So one electron is paired, then

other four electrons will be unpaired

Discussion

37.	Write five phycals properties of non metal
Answer» Answer: Lustrous ,MALLEABLE ,Ductile, Good CONDUCTOR of electricity ,Good conductor of HEAT ,

37.

Write five phycals properties of non metal

Answer»

Answer:

Lustrous ,MALLEABLE ,Ductile, Good CONDUCTOR of electricity ,Good conductor of HEAT ,

Discussion

38.	suppose you are to cook rice using cow dung cake and LPG as fuels which fuel would you prefer give your reason
Answer» ANSWER: LPG bcuz it is a good fuel rather than a COWDUNG it is smokeless,highcalorific VALUE and EASY to available..

38.

suppose you are to cook rice using cow dung cake and LPG as fuels which fuel would you prefer give your reason

Answer»

ANSWER:

LPG bcuz it is a good fuel rather than a COWDUNG it is smokeless,highcalorific VALUE and EASY to available..

Discussion

39.	CH2=CH-CH2-OH in the presence of H2 and Pt
Answer» Answer: Can you TELL me the question in a right way PLZ..I'm UNABLE to understand it..

39.

CH2=CH-CH2-OH in the presence of H2 and Pt

Answer»

Answer:

Can you TELL me the question in a right way PLZ..I'm UNABLE to understand it..

Discussion

40.	What is the cations of less familiar cations
Answer» GOLD, beryllium, thallium, CERIUM, titanium, zirconium, thorium, VANADIUM, molybdenum, tungsten, URANIUM, SELENIUM, tellurium, and platinum

Discussion

41.	What is the oxidation state of vanadium in the compound NH4vo3 a.-1;b.+1;c.+3;d.+5
Answer» Answer:it is +5 Explanation:as the amonium(NH4)s OXIDATION state is constant and equals to +1 so VO3 should be -1. And O 's is -2 3x-2 is -6 so to REACH -1 ,V should have an oxidation state of +5

41.

What is the oxidation state of vanadium in the compound NH4vo3 a.-1;b.+1;c.+3;d.+5

Answer»

Answer:it is +5

Explanation:as the amonium(NH4)s OXIDATION state is constant and equals to +1 so VO3 should be -1. And O 's is -2

3x-2 is -6 so to REACH -1 ,V should have an oxidation state of +5

Discussion

42.	State a few examples of radicals
Answer» ANSWER: H+,oh- Explanation: most COMMON RADICAL

42.

State a few examples of radicals

Answer»

ANSWER:

H+,oh-

Explanation:

most COMMON RADICAL

Discussion

43.	31. XeF (g) + H2(g) 2HF(g) + Xe(g); AH = – 430 kJusing the following bond energies : H-H = 435 kJ/mol, H-F = 565 kJ/molCalculate the average bond energy of Xe-F in XeF2
Answer» The average BOND energy of Xe-F in $XeF_2$ is 132.5kJ Explanation: The BALANCED chemical reaction is, $XeF_2(g)+H_2(g)\rightarrow 2HF(g)+Xe(g)$ $\Delta H=-430kJ$ The EXPRESSION for enthalpy change is, $\Delta H=\sum [n\times B.E(reactant)]-\sum [n\times B.E(product)]$ $\Delta H=[(n_{XeF_2}\times B.E_{XeF})+(n_{H_2}\times B.E_{H_2}) ]-[(n_{HF}\times B.E_{HF})+(n_{Xe}\times B.E_{Xe})]$ $\Delta H=[(2\times B.E_{Xe-F}+(1\times B.E_{H-H}) ]-[(2\times B.E_{H-F})+(1\times 0)]$ where, n = number of moles Now put all the given VALUES in this expression, we get $-430kJ=[(2\times B.E_{Xe-F})+(1\times 435)]-[(2\times 565)]$ $B.E_{Xe-F}=132.5kJ$ $XeF_2$ Therefore, the average bond energy of Xe-F in is 132.5kJ Learn More about average bond energy https://brainly.com/question/14286998 https://brainly.com/question/11655289

43.

31. XeF (g) + H2(g) 2HF(g) + Xe(g); AH = – 430 kJusing the following bond energies : H-H = 435 kJ/mol, H-F = 565 kJ/molCalculate the average bond energy of Xe-F in XeF2

Answer»

The average BOND energy of Xe-F in $XeF_2$ is 132.5kJ

Explanation:

The BALANCED chemical reaction is,

$XeF_2(g)+H_2(g)\rightarrow 2HF(g)+Xe(g)$ $\Delta H=-430kJ$

The EXPRESSION for enthalpy change is,

$\Delta H=\sum [n\times B.E(reactant)]-\sum [n\times B.E(product)]$

$\Delta H=[(n_{XeF_2}\times B.E_{XeF})+(n_{H_2}\times B.E_{H_2}) ]-[(n_{HF}\times B.E_{HF})+(n_{Xe}\times B.E_{Xe})]$

$\Delta H=[(2\times B.E_{Xe-F}+(1\times B.E_{H-H}) ]-[(2\times B.E_{H-F})+(1\times 0)]$

where,

n = number of moles

Now put all the given VALUES in this expression, we get

$-430kJ=[(2\times B.E_{Xe-F})+(1\times 435)]-[(2\times 565)]$

$B.E_{Xe-F}=132.5kJ$

$XeF_2$ Therefore, the average bond energy of Xe-F in is 132.5kJ

Learn More about average bond energy

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Discussion

44.	Explain the acidic character of hydrides of group 17 elements
Answer» EXPLANATION: hhikkkknczzsxvbnmkl

44.

Explain the acidic character of hydrides of group 17 elements

Answer»

EXPLANATION:

hhikkkknczzsxvbnmkl

Discussion

45.	Explain how Nitrogen Oxygen and inert gases like Argon are separated from air
Answer» ANSWER: After liquefaction of air by repeated compression and cooling; nitrogen, oxygen, carbon dioxide and ARGON are extracted using fractional distillation. Liquid nitrogen has boiling point equal to - 196⁰C and THUS turns into gas first and SEPARATED from air.

45.

Explain how Nitrogen Oxygen and inert gases like Argon are separated from air

Answer»

ANSWER: After liquefaction of air by repeated compression and cooling; nitrogen, oxygen, carbon dioxide and ARGON are extracted using fractional distillation. Liquid nitrogen has boiling point equal to - 196⁰C and THUS turns into gas first and SEPARATED from air.

Discussion

46.	What are the products obtained when iron fillings react with steam
Answer» ANSWER: When IRON REACTS with STEAM it GIVES outFe3O4+H2

46.

What are the products obtained when iron fillings react with steam

Answer»

ANSWER:

When IRON REACTS with STEAM it GIVES outFe3O4+H2

Discussion

47.	Why t2g is written as down eg written at the top
Answer» Explanation: because t2g has lower energy and eg has higher energy t2g CONTAINS DXY,dyz,dxz ORBITAL but eg contains dx2-y2& dz2 orbital .energy difference is LESS of t2g and eg

47.

Why t2g is written as down eg written at the top

Answer»

Explanation:

because t2g has lower energy and eg has higher energy t2g CONTAINS DXY,dyz,dxz ORBITAL but eg contains dx2-y2& dz2 orbital .energy difference is LESS of t2g and eg

Discussion

48.	The binding energy of electrons in a metal is 193 KJ.mole-1 The threshold frequency of the metal is
Answer» ANSWER: HOPE the answer will HELP you

48.

The binding energy of electrons in a metal is 193 KJ.mole-1 The threshold frequency of the metal is

Answer»

ANSWER:

HOPE the answer will HELP you

Discussion

49.	What happens chemically when quicklime is added to water filled in a bucket
Answer» Answer: the water will milky in COLOUR and START BOILING for some MINUTES

49.

What happens chemically when quicklime is added to water filled in a bucket

Answer»

Answer:

the water will milky in COLOUR and START BOILING for some MINUTES

Discussion

50.	Explain the term precipitation with an example.
Answer» Answer:the ACTION or PROCESS of precipitating a SUBSTANCE from a solution.eg:rain Explanation:um.?????

50.

Explain the term precipitation with an example.

Answer»

Answer:the ACTION or PROCESS of precipitating a SUBSTANCE from a solution.eg:rain

Explanation:um.?????

Discussion

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